Multiple spindle drill



June 16, 1936.

' H. I. LEWISET4AL' MULTIPLE SPINDLE DRILL Filed Aug. 51, 1933 5Sheets-Sheet 1 757 2 Wveuroes; F" Ahmev is was Rusk/ex 52v 75M) Z WwgdJune 1 1936- H. I. LEWIS ET AL MULTIPLE SPINDLE DRILL 5 Sheets-Sheet 2Filed Aug. 31, 1933 Amara/mks.- WARP) A law/s F3? yeozo saeemxm 5 A rwe've Y5 June 16, 1936. 7H. LEWIS El AL MULTIPLE SPINDLE DRILL 5Sheets-Sheet 3 Filegl Aug. 51, 1933 Q Wm ANA-"ra s DERMK warm ArraeuevsJune 16, 1936. H. l. LEWIS ET AL. L 2,044,709

MULTIPLE SPINDLE DRILL Filed Au 51,

1953 5 Sheets-Sheet 4 llllll l l I l l I I l l I I ll mm w p a: 5 4w NIn E Y m em r 5 A F n 16,193 H. I. LEWIS ml. 2,044,109

MULTIPLE SPINDLE DRILL Filed Aug. $1, 1953 V 5 Sheets-Sheet 5 PatentedJune 16, 1936 PATENT OFFICE MULTIPLE SPINDLE DRILL Harry I. Lewis andFrederick'W. Seybold, Dayton, Ohio, assignors to Harris Seybold PotterCompany, Cleveland, Ohio, a corporation of Delaware Application August31, 1933, Serial No. 687,586

23 Claims.

This invention relates to improvements in multiple spindle drills,particularly drilling machines for making perforations in paper sheets,

such for instance as are employed as fillers in loose leaf books.

One of the objects of the invention is the provision of means fordrilling a series of holes in a stack of paper sheets quickly andaccurately.

Another object is the provision of means for disposing of the cuttingsof a series of hollow drills in a simple and efiective way, which meansshall be unaffected by adjustment of the drill heads transversely of themachine for the purpose of regulating the spacing of the perforations.

Another object is the provision of control mechanism which in additionto providing automatic stopping at the end of the return stroke, permitsautomatic stopping at the end of the work stroke, that is at the pointof greatest penetration of the drills, in order to facilitate depthadjustment of the individual drills.

Another object is the provision of means for varying the high pointposition of a rising and falling work table, for the purpose ofproviding depth adjustment of all drills simultaneously whereby sets ofdrills of different lengths may be employed.

Another object is the provision of a novel press er foot for grippingthe work adjacent the point of application of the drill.

A further object is the provision of means for permitting the gauging ofsheets close to the line of centers of the drills.

Still another object is the provision of effective means for lubricatingthe drill.

Other objects and features of novelty will appear as we proceed with thedescription of that embodiment of the invention which, for. the purposesof the present application, be have illustrated'in the accompanyingdrawings, in which Figure 1 is a front elevational view of the completemachine, certain parts being broken away and others shown in section inorder to more fully illustrate the invention.

.Fig. 2 is a side elevational view.

Fig. 3 is anelevational view, partly in transverse vertical section andon a larger scale, of the table raising and lowering mechanism.

Fig. i is a side elevational view of the same, also partly in verticalsection. a

Fig. 5 is a detail sectional view taken substantially on the line 5-5 ofFig. 1, and showing one of the drill heads in elevation on a largerscale.

Fig. 6 is a sectional view taken substantially stroke.

on the line 6-6 of Fig. 5 showing the drill spindle and accompanyingparts.

Fig. 7 is a horizontal sectional detail view of aportion of a spindle,the view being taken substantially on the line 'l'i of Fig. 5.

Fig. 8 is a detail horizontal sectional View taken substantially on theline 8 of Fig. 5.

Fig. 9 is a horizontal sectional detail View taken substantially on theline 99 of Fig. 4.

Fig. 10 is an elevational detail view of the sliding jaw clutch member.

Figs. lland 12 are elevational detail views of two levers which may beemployed in connection with the invention.

Fig. 13 is a development of the perimeter of a slotted drum employed inconnection with the control for the table movement.

Fig. 14 is a large scale sectional view through the base of the clampingfoot and the drill lubricator carried thereby, and

Fig. 15 is a detail elevational view of an eccentrio driving element andother integral parts.

In the embodiment of the invention herein illustrated the hollow drillsrotate without axial movement. The table upon which the work ispositioned moves up to feed the work to the drills and then down againto permit the finished work to be removed and new work to be placed inposition against the back and side gauges. The cuttings travel upwardlythrough the hollow drills and through passages in the spindles and inthe drill heads into a transverse conveyor, in the present instance ascrew conveyor, which is carried by the frame of the machine, and withwhich the head passages are always in communication regardless of thepositions of adjust-' ment of the heads. In the present embodiment thetable has a fixed length of stroke up and down, but that stroke may beraised or lowered, thereby permitting the use of drills of differentlengths. The up and down movement of the table is arranged to be stoppedwhen a clutch is disengaged, and a control for the clutch may be set forautomatic disengagement'at the bottom of the table stroke, or forautomatic disengagement both at the bottom and at the top of the Thestopping of the table in the top position is for the purpose of enablingthe operator to set the drills accurately in relation to the woodendrill strip in the table. The control also provides for continuousrunning, that is without disengagement of the clutch, and for jogging,that is manual control by means of which the clutch may be thrown in orout at will so as to cause movement of the table up or down to anyextent desired and to stop the movement at the desired position.

Referring now more particularly to the drawings, the frame or body ofthe machine is indicated by the reference numeral l5. In the body of themachine are provided vertical ways l6, within which slides I! areadapted to move up and down. These slides are integral parts of apedestal l8 upon which is carried the work table 19. The latter isillustrated in its lowermost position.

The upper part of the machine body is U shaped, that is it comprises twohollow vertical side posts 20 and 2|. Connecting the upper ends of theseposts and rigidly attached to both of them is a cross rail 22, more orless rectangular in cross section, its cross sectional shape beingillustrated in Fig. 5. This rail carries the adjustable drill heads andthe conveyor for disposing of the drill cuttings. On its forward side itis provided with a wide dovetail 23, 24, the intermediate portion 25between the two separated parts of this dovetail being curved rearwardlyto accommodate the drill heads and their driving shaft, as willpresently appear.

At the ends of the dovetail 23, 24 we mount two brackets 26 havingdovetail portions which are formed to fit the dovetail 23, 24, thesebrackets being secured against movement upon the rail by screws 21 orthe like. Each bracket carries a bearing for a shaft 23, through whichpower is furnished for the rotation of the drill spindles.

In the lower part of the rail 22 there is a conveyor comprising alengthwise passage 29 which is open on the forward side of the railthroughout the length of the latter. A conveyor screw 38 may bepositioned within this passage. A free exit for cuttings is providedbetween the hollow post 20 and the adjacent end of passage 29, so thatthe cuttings may drop down through the post onto an inclined surface 3|therein, by means of which the cuttings are directed rearwardly into anyconvenient receptacle, not shown.

Any desired number of drill heads 32 may be mounted upon the dovetail23, 24. Each head has a dovetail form to engage the dovetail portion 23of the rail, and at the top is provided with a wedge block 33 whichengages behind the dovetail portion 24. The wedge carries a threaded.post 34 which extends through a perforation in the head and hasthreadedly mounted thereupon a thumb nut 35. When the head 32 is to beadjusted lengthwise of the rail 22, the thumb nut 35 is loosened, andwhen the desired adjustment has been made the nut is again tightened,thereby locking the head against movement. The wide dovetail insuresaccurate positioning of the various heads, as well as of the bearingsfor the shaft 28, and thereby maintains the shaft and drill heads inaccurate position relative to each other.

Each head 32 is partly hollow and accommodates a spiral gear 36, whichis free to slide upon the shaft 28 but is held against turning movementwith respect thereto by a key 31 mounted in the gear and free to slidewithin a keyway 38 in the shaft. Plates 39, removably attached to thehead, hold the gear 36 in proper position within the head.

In each head there is a vertical spindle 4!! rotatably mounted in ballbearings 4! and 42 and in an oil-less bushing 43. Upon this spindlethere is a spiral gear M which meshes with gear 36, and which isslidably keyed to the spindle in order to permit vertical adjustment ofthe latter. Such vertical adjustment is accomplished by means disclosedin detail in Patent 1,554,060 to J. T. Wright. Briefly, this meansconsists of a nut 45 mounted upon a threaded portion of the spindlebetween two split collars 46 and 41, the collar 46 engaging an upperball thrust bearing 48 and the lower collar 41 engaging a washer 49which rests upon the lower end of a window 50 in the head. As the nut 45is rotated in one direction or the other, being held by the collars andby the bearing 38 and washer 59 against vertical movement with respectto the head, it causes the spindle to move up or down in the head. Thecollars 46 and ti! are caused to rotate with the spindle by means ofscrews 5| and 52 set into the spindle, the heads of the screws extendinginto the spaces between the ends of the split collars. The nut 45 iscylindrical on its outer surface, and is provided with one or morevertical slots for the reception of a pin or pins 53 mounted in aknurled ring 54. One or more projections 55 at the lower edge of ring 54are adapted to extend into sockets 56 in the upper edge of split collar41'. When an adjustment is to be made the operator raises ring 54 todisengage the projections and sockets 55 and 56 respectively, rotatesthe ring to impart rotation to the nut to the desired extent, and thenpermits the ring to descend again, causing the projections 55 to againenter the sockets 56,

whereby the nut is locked against accidental niovement. Quick adjustmentof the spindle up or down to accomplish individual adjustment of thedrills is thereby provided.

The lower end of each spindle has an enlarged part which extends throughthe bushing 43 and comprises a chuck for the reception of the hollowdrill 51. This enlarged portion of the spindle is provided with apassage 58 communicating at the bottom with the bore of the hollow drilland deflected at the top and terminating there at a somewhat reducedportion of the spindle in a mouth 59 which opens into an annular chamber6% in the head surrounding the spindle. Opposite the mouth 59 thespindle is provided with a wing 6! which sweeps through the chamber 63and serves to expel any cuttings discharged from the mouth 59 into aninclined passage 62 formed in the head in communication with the chamber60. The lower end of the passage 62 registers with the conveyor passage29 in the rail 22. The 4 hollow drill per se forms no part of thepresent invention but, as an example of a drill which may be employedfor the purpose, reference may be had to Dom Patent 1,279,495, issuedSeptember the lower part of which may be cylindrical as shown in Fig. 5.The upper portion of the plunger however is a hexagonal rod 65 which hasits lower end turned down and threaded to fit within a threaded socketin the upper extremity of the cylindrical part 64. A nut 66 threadedonto the threaded portion of the hexagonal rod 65 may be turned downagainst the cylindrical portion 54 to lock the two plunger elements indesired relative adjustment. The plunger extends through a cylindricalbore in the head 32 of a size to slidably fit the cylindrical part 64 ofthe plunger. Around the hexagonal rod within this bore there is a spiralspring 6'! which bears at its lower end against the nut 66 and at itsupper end against a plug 68 mounted in the upper-extremity of the boreand-provided with a hexagonal opening which acts as a guide for thehexagonal part 65 of the plunger as it moves up and down. The plug I38may be held aaginst movement by a set screw 69. The plug 88 prevents theplunger from turning during the operation of the machine, but. if, anyslight rotational adjustment of the plunger is. desired it may besecured by loosening the screw 69, after which the plunger may be turnedto the desired angle and the screw again tightened. I9 is a collarmounted upon the plunger above the head andheld in any desired positionby a set. screw II. This collar 19 acts as an ad- When the stop 19 isadjusted downwardly on the plunger the initial position of the presserfoot 63 is raised, and at the same time the initial pressure of thespring 91' is increased, but with a 18 which acts as a drill block.

.given'relative' relation between the parts 64 and 65 of the plunger,and assuming that the spring 81 is always under more or less pressure,then the spring pressure exerted by the presser foot 63 upon the workpile varies directly with the distance between thepresser foot 63 andthe head 32, in other words it varies directly with the degree ofpenetration of the drill into the paper.

stock. The stock therefore is gripped most firmly at the end of the workstroke when the need for gripping is greatest, but in practice theadjustments are such that the paper is also gripped under a considerablepressure at the beginning of the work stroke.

We provide special means for applying lubrication to the exteriorsurface of the drill in order to facilitate its travel through the paperstock, but the lubricating liquid is of sucha character and it isapplied so sparingly as not to cause any discoloration of the paperaround the perforation. To this endwe providea fountain brush whichcomprises a hollow metal container 12 with .a brush tuft T3 at its lowerextremity. Thiscontainer is threadably mounted in the foot 63 and has aknurled head I4 by which it may be turned so as to position itselfaxially at such a point as to cause the brush to engage the side of thedrill to such an extent as to feed the proper amount of lubricant ontothe rotating surface of the drill. In the upper end of thecontainer'there is a filler plug I5 which is provided with a taperedcentral opening. A tapered plug I6 fits this opening. When the plug 19is loosened or removed atmospheric pressure is free 'to assist gravityin producing a flow of lubricant through the brush .13 vonto the drill.When the plug I6 is pushed tightly into its socket, however, air cannotenter the container and the flow of lubricant is interrupted.

In the top of the table I9beneath the line of centers of the drills 5'5there is a transverse groove 11 which receives a maple or other woodenstrip In the upper surface of the table rearward of the strip 18 thereis a dovetail groove I9 within which slides a dovetail block 89constituting part of a backcloseto the edges of the paper stock. In suchcases we mount upon the gauge plate 8| a plurality of gauge strips .83which have upper portions hooked over the plate Ill and which aresecured in desired position by set screws 84. These gauge strips aremounted out of alignment with the drill, spindles, and they permit theforma tion of perforations right up to the gauge line. The table is alsoprovided with a side gauge 85, omitted from Fig.1 for the sake ofclearness. This gauge may be mounted or adjusted in any desired manner.

. In the forward end of the table I9 there is a depending hanger 86carrying a split bearing 91 within which is oscillatably mounted a shaft88.

. A crank handle 89 is pinned to the forward end movement of theconnecting rod 92 imparts reciprocation to the table I9, moving in itsways I9. The axis of pivot 9!, however, may be raised or lowered withrespect to the table by the manipulation of the handle 89, therebychanging the upper and lower limits of the table stroke without changingthe length of the stroke.

The mechanism for reciprocating the table and the control for thatmechanism constitute a unit which is separable from the balance of themachine for facility in repair and replacement. This unit is mounted ina box 957which may be secured to the forward transverse part of theframe by bolts 96. A cover 9'! closes the rear of the box. In the top ofthe box there is an opening 98 through which the connecting rod 92extends.

On the forward wall of the box 95 there is formed a forwardly andrearwardly extending boss 99 within which is supported a large pin orfixed shaft I99. Upon this pin there is rotatably mounted ,a castingillustrated in Fig. 15, which includes an eccentric Bill, a concentricdisc I02 with tapped holes I93 therein, and a drum I94. A pair ofeccentric straps I95 and I98embraces the eccentric IIlI. Studs IEI'Isecure these eccentric straps togetherand to the lower end of connectingrod 92.

A worm wheel I08 surrounds the forward part of drum I04 and is securedto disc I02 by means of bolts or studs I09 extended through openings inthe worm wheel into the tapped holes I93 of the disc. A plate H0 securedto the rear end of pin I09 serves to hold these rotating parts againstaxial movement.

Worm wheel I98'is driven by-worm III on a shaft H2 which is mounted inball bearings H3 and I I4 carried by the box 95. Beyond the bearing H4the shaft H2 is splined to slidably carry a jaw clutch member I I5 whichis normally urged toward the left, as viewed in Figs. 1 and 3, by

a coil spring H6 surrounding the shaft and the hub of the clutch member.The jaws of this clutch member are adapted to engage with jaws of aclutch member HI carried upon the end of a shaft H8 aligned with theshaft H2. This shaft H8 is mounted in ball bearings carried in anoutwardly extending cylindrical boss H9 on the box 95. Beyond the bossH9 there is keyed to shaft H8 a fiy-wheel I29 which overhangs the .bossH9 to some extent and is'provided with a pair of integral V-pulleys I2I.V-belts I22 run from these pulleys over a pair of small pulleys I23 onthe shaft of an electric motor I24, the base I25 of which is hung from atransverse rod I26 about which the base may pivot. Adjusting screws I21are threaded through the lower end of the base I25 and bear against somefixed part of the machine frame or box 95. By this means the propertension in the belts may be secured and maintained.

On the outer extremity of'the shaft II8 we mount a sprocket wheel I28which is connected by means of a chain I29 with a sprocket I30 on oneextremity of shaft 28. Driving force from the latter shaft to theconveyor screw 30 is transmitted by a pinion I 3| made integral withsprocket I30 and meshing with a gear I32 on the shaft of conveyor screw30.

A brake shoe I33 is adapted to engage the periphery of fly-wheel I20 andis pivotally mounted upon the short end of a bell crank lever I34 whichis pivoted at I35 in the frame of the machine. At its upper end itcarries an operating handle I36 which projects through an opening in themachine frame. This braking means may be employed to stop the fly-wheelpromptly after the motor switch has been opened.

The sliding clutch member II may be caused to move away from engagementwith the clutch member II1 when a pin I31 on the upper end of a bellcrank lever I38 is caused to drop into engagement with a cam grooveformed in an enlargement of the clutch member. When this occurs therotation of the clutch member with its cam face against pin I31 forcesthe clutch member to the right'against the action of spring I I 6,disconnecting the clutch members'and thereby interrupting theapplication of driving force to the table moving mechanism. Lever I38 isprovided with a perforated hub I39 which is mounted upon a short shaftI40 that has hearing in a side wall of box 95. The lever I38 is securedagainst rotation upon the shaft by means of a set screw, not shown,threaded into the tapped hole I 4|. On the outer end of shaft I40 thereis secured a bell crank lever I42. Pivotally connected at I43 to thislever is a rod I44 which runs through a perforated bracket I45 mountedon the box 95. Below this bracket a coil spring I46 surrounds the rod.This spring abuts against and is adjustably tensioned by a pair of nutsI41 threaded onto the lower end of the rod. The spring tends to rock theshaft I40 in a clockwise direction as viewed in Figs. 2 and 4. In orderto rock the shaft I40 in an anti-clockwise direction we attach to thelower end of lever I 42 at I '48 a link I49 which extends through asuitable opening in the box 95 and is pivotally connected at its forwardextremity to a crank I50. The latter is pinned to a shaft I5I, and onthis shaft there is also secured a pedal I52. When pressure is appliedto the latter by the operator's foot, the shaft I40 is turnedanti-clockwise against the action of spring I46.

Lever I38 has pivotally mounted thereon at I53 another bell crank leverI54, the lower arm of which bears against a spring pressed plunger I55slidable in a socket I56 formed in a projecting arm I51 of the leverI38. The upper arm of lever I54 is formed to enter a notch I58 in theperiphery of the clutch member I I5. A pin I59 mounted in a socket I60in lever I38 is adapted to engage the rear side of lever I54 and toretract that lever when the lever I38 is retracted. When the clutchmember I 15 is moved out of clutching engagement, and the application ofpower to the table moving mechanism is thereby interrupted, themechanism tends to stop, but there might be suflicient fly-wheel effectto rotate clutch member II5 far enough to permit pin I31 to descendagain into engagement with the low part of the cam surface on the clutchmember, thereby temporarily engaging the clutch members a second time.The lever I54 falling into socket I58 .on the clutch member preventssuch an occurrence. It also enables a stopping of the table at anabsolutely accurate position, for instance at the very top of itsstroke, which is of advantage in setting the drills for depth of out.

In addition to the pedal means for manually withdrawing the clutch pinI31, we provide automatic means which will now be described. I6I is anoscillatable shaft which may be moved longitudinally. It has fourdifferent longitudinal positions, determined by a spring detent I62adapted to take into any one of four different annular grooves in theshaft. The shaft extends out through an opening I63 in the forward wallof the machine frame and on its outer extremity carries a knob I64 tothe rear face of which is secured a sector shaped plate I65. This plateserves as a pointer which is used in conjunction with a plate I66 (Fig.9) on the top of a bracket I61 to indicate to the operator thelongitudinal setting of the shaft I6I.

A crank arm IE8 is pinned to shaft IBI. On it is pivoted at I69 a bladeI which has a notch in its lower edge to receive a stop pin III carriedby the arm I58. A tension spring I12 tends to hold the forward end ofthe plate I60 down. This loose mounting of the plate I10 upon the armI68 prevents jamming and possible breakage of the parts.

On a splined rear portion of shaft I 6I there is .slidably mountedagainst relative rotation an arm I 13, which at its outer extremity ispivotally connected with a link I14 that extends down to and ispivotaliyconnected with lever I38 at the point I thereof. It will beevident therefore that if the arm I68 is swung clockwise in Fig. 3 thelink I14 .will be raised and the shaft I40 will be turnedanti-clockwise, thereby withdrawing the clutch pin I31.

In the furthest forward position of shaft I 6I, marked Continuous on theplate I66, the blade I10 rides over the uninterrupted smooth peripheryof drum I04, which corresponds with the upper portion of the developmentshown in Fig. 13. In the second position, marked Stop bottom on plateI66, the blade I10 rides upon the periphery of the drum until itencounters deep slot I16 in thedrum, when the blade enters that slotenabling spring I46 to turn shaft I 40' clockwise and disengage theclutch. The slot I16 is so positioned as to stop the table at the bottomof its stroke. In the third position of the shaft, marked Stop'top onplate I 66, the blade I10 can enter shallow slot I11 as well as deepslot I16. These slots being arranged 180 apart, the table stops at thebottom of its stroke and again, after the driving mechanism is releasedmanually, at the top of its stroke, and so on. In the rearmost positionof shaft I6I, marked Jog on plate I66, the blade I10 is withdrawn fromany contact with drum I04. The spring I46 is accordingly free to throwthe pin I31 to clutch disengaging position, and it is held there exceptduring such time as the operator keeps his foot on pedal I52. With thissetting therefore it is possible for the operator to move the table toany desired point inits stroke by'merely removing his foot from thepedal I52 when the table reaches such desired point.

The rail 22 with its accompanying parts may be withdrawn rearwardlyafter bolts I19 extended through openings I 80 in the rail and threadedinto tapped openings in the frame have been removed. When this is donethe chain I29 is first disconnected. The rear sides of the posts 20 and2! are open sufficiently to permit the protruding parts of'the shaft2B'and screw conveyor 30, with their sprockets and gears, to bewithdrawn.

Operation.In the drawings two drill heads are illustrated. It is to beunderstood, however,

that any number within the capacity of the machine may be employed. Whenthe back and side gauges have been set for a given piece of work and thedrill heads have been positioned, drills are mounted in the spindles.The operator then swings handle 9!] to loosen split bearing 98, afterwhich he moves handle 89 so as to lower the table with respect to theconnecting rod 92. Next, he sets the knob I64 with the plate I65opposite the notation Stop top. He then starts the motor I26 and thetable travelsupwardly to the top of its stroke, and stopsowing to thefact that the blade I'Ill drops into slot IT! in drum I04. The operatornow manipulates handles 90 and 89 again to raise the table sufficientlyto cause one or more of the drills to engage the wooden strip 18. Owingto the fact that the drills may not all be of identically the samelength they may not all touch the strip I8, but the operator nextproceeds to make them do so by manipulating the rings 54 of theindividual spindles in the manner heretofore described, it beingunderstood, of course, that the motor is stopped while such adjustmentis being made.

With the motor running, the operator will then touch the pedal I52 withhis foot, thereby withdrawing blade IIB from slot IT! and permitting theclutch members to engage, whereupon the table will descend and the drumI94 will rotate sufiiciently to permit blade I'IB to enter slot I16,when the table will be at the bottom of its stroke. Everything is thenin readiness for a regular run of work. The sheets are placed againstthe gauges, the operator touches the pedal I52, the table rises andfeeds the work to the drills, and then recedes again, automaticallystopping at the bottom of its stroke. The finished work is then removedand new work put in its place and the operation repeated.

In some cases it may be possible to remove fin- 1 ished work and put newwork in its place without extending through said head parallel to saidrail,

gearing between said shaft and spindle movable lengthwise of the shaftas the head is moved along the rail, and bearings for the ends of saidshaft mounted upon said rail.

2. In a machine of the class described, a rail having a dovetailsupporting portion, a drill head mounted upon and adjustable lengthwiseof said dovetail supporting portion, a spindle rotatably mounted in saidhead, a driving shaft parallel to said rail extending through said head,gearing between said shaft and spindle movable lengthwise of the shaftas the head is moved along the supporting rail, and brackets carryingbearings for said shaft, said brackets being mounted upon said dovetailportions at the ends of the rail.

3. In a machine of the class described, a rail, a drill head mountedupon and adjustable lengthwise of said rail, a hollow drill rotatablycarried by said head, a driving shaft extending through said headparallel to said rail, gearing between said shaft and said drill movablelengthwise of the shaft as the head is moved along the supporting rail,a conveyor carried by said rail extending lengthwise thereof, and meanscarried by said head for delivering cuttings from said drill into saidconveyor.

4. In a machine of the class described, a rail, a drill head mounted.upon and adjustable lengthwise of said rail, said rail having alengthwise passage therein open on the side toward said adjustable head,a mechanical conveyor in said passage, a hollow drill rotatably mountedin said head, means for driving said drill, and means for deliveringcuttings from said drill into said conveyor passage.

5. In a machine of the class described, a rail, a drill head mountedupon and adjustable length- 1 Wise of said rail, said rail having alengthwise passage therein open on the side toward said adjustable head,a spindle rotatably mounted in said head, a hollow drill mounted in saidspindle, means for rotating said spindle, said head having an annularchamber surrounding the spindle and said spindle having a passagetherethrough for receiving cuttings from said drill and delivering theminto said annular chamber, and said head having an inclined passageconnected with said chamber and registering with the open side of saidrail passage.

6. In a machine of the class described, a rail, a drill head mountedupon and adjustable lengthwise of said rail, said rail having alengthwise passage therein open on the side toward said adjustable head,a spindle rotatably mounted in said head, a hollow drill mounted in saidspindle, means for rotating said drill, said head having an annularchamber surrounding the spindle and said spindle having a passagetherethrough for receiving cuttings from said drill and delivering theminto said annular chamber, said head having an inclined passageconnected with said chamber and registering with the open side of saidrail passage, and a sweeper blade on said spindle within said annularchamber for forcing cuttings into said inclined passage.

7. In a machine of the class described, a rail, a drill head mountedupon and adjustable lengthwise of said rail, a conveyor carried by saidrail extending lengthwise thereof, and means for delivering cuttingsfrom said drill head to said conveyor effective in all positions of thedrill head.

8. In a machine of the class described, a rising and falling table,mechanism for causing said table to move up and down through a givenstroke of predetermined length, said mechanism comprising a connectingrod, a pivot for one end of said connecting rod, and an eccentricmounting for said pivot by means of which its distance from said tablemay be varied. I

9. In a machine of the class described, a rotating drill, means forfeeding the drill and the work toward each other, and means fixed withrespect to the work during thedrilling operation for brushing liquidonto the side of the drill.

102' In a machine of the class described,a rotatingdrill, a presser footadapted to engage the work adjacent the drill, means for feeding thedrill and the work toward each other, and means carried by the presserfootafor applying liquid to the side of said drill.

11. In a machine of the class described, a drill, a Work table beneaththe-drill, mechanism for producing. relative movement of the drill andtable toward and away from each other in a recurring cycle, saidmechanism comprising a crank and connecting rod, and control meanssettable to interrupt the. said movement at the point of greatestseparation, or to interrupt'the movement both at the point of greatestseparation and at the-point of closest approach.

12. In a machine of the class described, a drill, a work table beneaththe drill, mechanism for producing relative movement of the drill andtable toward and away from each other, said mechanism comprising a crankand connecting rod, and control means settable to permit'continuousoperation of said mechanism, to inter-,-

rupt the said movement at the point. of greatest separation, tointerruptthe movement. both at the point of greatest separation and at the pointof closest approach, orto interrupt the movement at any desired point.

13. In a machine of the class described, a pair of' spaced posts, a railmounted between said.

posts, a drill head adjustably'mounted upon said rail, a spindle in saidhead, a shaft'removablymounted in the rail extendingthrough said drillhead and operatively connectedwith said spindle, one endof said shafthaving a drivingelement thereon, and means forremovably securingsaidrail to'said posts.

14.- In a machine of theclass described, apair of' spaced posts, a railmounted'between said posts, a drill head adjustably mounted upon saidrail, a spindle in said head, a shaft removably mounted'in' the railextendingthrough said drill headandoperatively connected with saidspindle; a mechanical conveyor for cuttings-mounted in. said rail, meansfor operatively connectingsaid shaft and conveyor, a driving elementattached to one of said'last named elements, and means for..- removablysecuring said rail to saidposts.

15. In a machine of-theclassdescribed, a head.

having a vertical-boretherethrough, a.-.plunger extending throughsaid-bore, a:presser foot on the lower end of the plunger, spring.meanswithinthe. head tending to depress said :-plunger, and anadjustable stop on the upper end of the plunger adaptedto engagesaid-head tofrlimit the-downward movement of.-the plunger.

16; In a machine'of the class described, a head having a vertical boretherethrough, a plunger.-

extending-through said bore, a presser. foot on -the lower end of theplunger, spring means within, the-head tending to depress said plunger,means:

carried by the plunger for varying-the tensionof the spring means, andan adjustable stop on-the upper end ofthe plunger adapted toengage saidhead to limit the downward movement of the plunger and to permitdownward movement thereof to a sufiicient extent to expose said ten-'sion varying means.

17. In a machine of the-class described, a head having a vertical boretherethrough, a plunger.

extending through said bore; said plunger being formed in two separableparts with the joint therebetween normally positioned within said bore,a'presser foot onthe lower end of the plunger, spring means withinthehead tending to depress said plunger, and an adjustable stop on theupper end of the plunger adapted to engage said head to limitthe'downward movement of theplunger and to permit downward movementthereof toan extent sufiicient to expose said joint, wherebyythe plungermay be disassembled and removed from the bore.

18. In a machineof the class described, a head having a vertical boretherethrough, a plunger extending through said bore, the upper-portionof said plunger having a non-circular cross section, a collar having anopening therethrough shaped to slidably fit the non-circular portion oftheplunger, said collar having a circular outer surface fitting withinsaid bore and rotatable therein, and means for holding the collar in anyone of aiplurality of different angular positions,

. whereby the angular arrangement of the plunger maybe-adjusted.

19.In a machine of the class described, .a rotatingdrilL a presser footadapted to engage the work; adjacent the drill, means for feeding thedrill and-the work toward each other, and a fountain .brush carried bythe presser foot in position to'engage the side-of the drill and tobrush liquid thereonto.

20. In a machine of the class described, a drill,.a

work table beneath the drill, a crank and connectingrod for producing acycle of relative movements of the drill and table from a point ofgreatest separation to a point of closest approach and back again tosaid point of greatest separation, and control means settable in advancefor automaticallyinterrupting said cycle at the point of closestapproach.

21. In a machine-of the class described, a drill,

means-for:adjusting the drill longitudinally, a

workrtablebeneath the drill, a crank and connecting rod for producing acycle of relative movements of the drill and table from a point ofgreatestwseparation through a stroke of fixed length to a point ofclosest approach. and back again to said point of greatest separation,and control means settable in advance for automatically,

23.- In a machine of the class described, a drill,-

a work table beneath the-drill, means for verti cally reciprocating oneof said elements through a stroke of given length, said means beingnormallyinterrupted automatically at-the point of greatest separation ofsaid elements only, and

means actuatable during the operation of the ma-- chinefor automaticallyinterrupting the said reciprocation when said movable element nextarrives at the point of closest'approach.

HARRY I. LEWIS. FREDERICK .W. SEYBOLD.

